ufh

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  1. R

    Boiler side connections for UFH wiring centre

    I've been away from electrical work for about 30 years so I'm not familiar with all the names and terminology that's been introduced over the years. We're having UFH heating installed. Plumber is doing the pipework, s-plan etc and I'm installing a Heatmiser wiring centre. for the electrical...
  2. S

    JG UFH wiring control box no power

    I have a JG JGWC wired control centre which has lost power. Have been advised it is discontinued and replacement is JGWC4 which is differently wired internally? Top is current one now discontinued Bottom replacement one
  3. S

    UFH mat in bathroom

    Was at a job yesterday & whilst running cables for lighting in a side attic space I came across something I’ve not see before (not surprisingly). The couple had a new bathroom installed last year & by the looks of it whoever installed the underfloor heat mat, they never measured the UFH mat...
  4. A

    UFH pump not turning on

    Hi all, I've noticed that my UFH pump is not always turning on as soon as the stat & valve calls for heat. This results in hot water passing through the underfloor pipes but without being pumped, which means it takes forever for the room to heat. From testing with a multimeter I see that it's...
  5. S

    Wet UFH/ Radiator system

    What’s the best setup for a system that has a heating system with existing radiators but a wet underfloor heating system is being added to a new extension. I will need a 3 channel programmer I assume? The plumber mentioned having it on all the time but just working on/off the independent stat in...
  6. Jukv96

    Loose Wire UFH + Stairs

    I have a loose wire underfloor heating system I am installing for a client ideally they would like the UFH to continue into the down stairs loo which is off the hallway down 2 steps. It's all going to be tiled and theres no bullnose on the steps. Anyone ever come across this scenario, did you...
  7. G

    UFH - 4 core old and 2 core new Actuators

    Replacing 15 year old FAR Italian manifolds (2 downstairs, 1 up) with new Warmup units. However, old actuators have 4 core and new only have 2 core. Can someone please explain what the additional 2 cores are used for in the old actuators and how to modify the wiring for the new, and perhaps if...
  8. sythai

    UFH pump help please.... ??

    Hi Guys Just seeing if anyone can help please. Does this pump come with plug in type/ pre flexed feed (hopefully that makes sense!) as cant see how to get inside to wire it up ? Where its located have zero room and struggling to get in and see properly (thanks plumbers !) Cheers Sy
  9. J

    Combi S plan ufh and rads

    A combi is heating 5 ufh zones downstairs and 1 radiator zone upstairs. It has a two port valve for each. My question is, would you fit this with two wiring centres? One normal one that everything goes back to and then a separate ufh wiring Centre that all the stats and actuators connect to...
  10. R

    UFH Thermostat model help

    Hi, I'm looking for some help with an UFH thermostat that I can't find the model of. All I can see is that it's made by Rehau. Installed roughly 2008-09. I'm trying to set the schedule on the device but the symbols aren't obvious what they are trying to communicate so I want to find the manual...
  11. littlespark

    UFH actuator fault. Causes?

    What can do this to an actuator? Overvoltage? Wear and tear? Stuck pin on the valve? This is in the German built kit house I’ve done work in before. The actuator controller is powered separately to the central heating boiler.. each room has a stat, which then opens one or more actuators for...
  12. sythai

    Where do i get one of these please ?

    Hi Guys Got an Emmeti UFH manifold box we wired up a while ago, fuse inside has gone 'pop' for some reason. Not brought this type of fuse before - clear casing, got 4a marking on PCB above. What do I search for is it a special type ? Thanks Sy
  13. M

    Wet UFH Tripping RCD

    Hi. I’ve recently had installed a manifold (including zone valve and pump) for the newly installed Wet UFH in my extension. The system is split into three zones 1) Hot Water 2) Extension UFH 3) The rest of the house which is the original central heating system. All work fine when switched on...
  14. S

    Large electrical ufh install

    Hi all any advice welcome. Long story but at the last moment I have been asked to advise on the possibility of installing electric ufh in a large yoga room as bums are cold on the floor. Room is 90sqm but my thinking for easy install supplier does 12sqm mats so perimeter left out that is 2x...
  15. R

    Smart Heating System - Heatmiser or other?

    Hi all, I have a slightly mish-mash heating set up, in that downstairs I have wet underfloor heating with an individual thermostat per room, but upstairs it's a single thermostat for the entire floor with normal radiators with TRVs. I want to be able to control the temperature in each room...
  16. A

    Urgent boiler and ufh wiring help needed...

    Hi I need some help on how to wire up this nightmare... (They're usual sparky had an argument with customer and left job)...Trying to help a mate out, just not done boilers before... Property has a Greenstar external 18/25. Hot water and heating running off a Honeywell DT9400C and BDR91... Has...
  17. S

    I need advice on fcu for UFH

    I've had a electrician say i need to come from fcu but its going on a dedicated rcbo do i need fcu
  18. Pretty Mouth

    Wireless UFH thermostat

    All of the UFH thermostats that I have ever fitted have had the air temperature sensor integrated into the hard-wired wall mounted programmer, with the floor temp sensor cable also connected directly to it. I have a small UFH job where the UFH will be the primary heat source, so an air sensor...
  19. D

    UFH Heatmiser to Grant Vortex combi help

    Hi I have a heatmiser uh4 wiring centre and a grant vortex combi condensing oil boiler, doing the heat and HW in a small cottage, the room stats, pump and actuators are ok, but I need a bit of help with the connections to the boiler please, the connections at the burner plug are – 1 - sw live CH...
  20. R

    Ufh contactor wiring advice please

    Evening all, Doing a bit of forward planning for an extension with possible electric ufh. i Have worked out room will need 25m2 split between 2 matts 15 and a 10. 150w per square meter matts. I work out as about 16.3 amps in total. Only one stat so a contractorwill have to be fitted.. if...
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